US20220339421A1 - Medical device - Google Patents
Medical device Download PDFInfo
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- US20220339421A1 US20220339421A1 US17/811,334 US202217811334A US2022339421A1 US 20220339421 A1 US20220339421 A1 US 20220339421A1 US 202217811334 A US202217811334 A US 202217811334A US 2022339421 A1 US2022339421 A1 US 2022339421A1
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- Prior art keywords
- medical device
- screw groove
- connector portion
- engagement protrusion
- side wall
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M39/1011—Locking means for securing connection; Additional tamper safeties
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1033—Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
Definitions
- the present disclosure relates to a medical device.
- a medical connector or a syringe having a connector portion are known.
- Such a medical device sometimes includes a screw groove configured for fluid communication between the connector portion and another medical device.
- U.S. Pat. No. 8,157,784 discloses a medical connector (medical device) including a closed male connector portion that can be closed by a valve body, the medical connector further including a screw groove configured for fluid communication between the male connector portion and a female connector portion of another medical connector (another medical device).
- the female connector portion of another medical connector is a closed female connector portion that can be closed by an elastic valve.
- another medical connector is screwed along the screw groove so that a spike provided on the male connector portion penetrates the valve body and the elastic valve in contact with each other, whereby the male connector portion and the female connector portion can be connected in such a manner that a fluid communicates between the male connector portion and the female connector portion.
- the medical device described in U.S. Pat. No. 8,157,784 is configured such that the valve body biases another medical device in the separation direction and the valve body is pressed against the elastic valve when another medical device is screwed along the screw groove. In this manner, the screw can be easily loosened when the external force in the pulling direction is applied particularly in the case where the valve body is configured to bias another medical device in the separation direction.
- a medical device which includes a connector portion capable of suppressing an unintentional release of fluid communication due to an application of an external force in a pulling direction.
- a medical device as a first aspect of the present disclosure is a medical device including: a connector portion having a distal end and a proximal end, and a screw groove configured for fluid communication between the connector portion and another medical device, in which the screw groove has a first side wall on a distal side of the screw groove and a second side wall on a proximal side of the screw groove, and the first side wall has a stop portion whose lead angle has been reduced or eliminated.
- the connector portion has an outer cylinder and an inner cylinder arranged on a radially inner side of the outer cylinder, and the outer cylinder has the screw groove, and the inner cylinder has an engagement protrusion which is guided to the screw groove.
- the inner cylinder is biased toward the distal end.
- the engagement protrusion is in point contact with the stop portion.
- the medical device further includes a stopper that abuts on the engagement protrusion, which has reached the stop portion, so as to prevent the engagement protrusion from moving toward the proximal end.
- the connector portion further has a valve body arranged on a radially inner side of the inner cylinder, and a spike capable of penetrating the valve body.
- a medical device as a second aspect of the present disclosure is a medical device including a connector portion having a distal end and a proximal end, in which the connector portion has an outer cylinder and an inner cylinder arranged on a radially inner side of the outer cylinder, the inner cylinder has a screw groove configured for fluid communication between the connector portion and another medical device, and the outer cylinder has an engagement protrusion guided to the screw groove, the screw groove has a first side wall on the distal side of the screw groove and a second side wall on the proximal side of the screw groove, and the second side wall has a stop portion whose lead angle has been reduced or eliminated.
- a medical device as a third aspect of the present disclosure is a medical device including: a connector portion having a distal end, a proximal end and a central axis; and a screw groove for fluid communication between the connector portion and another medical device, in which the screw groove has a first side wall on the distal side of the screw groove, a second side wall on the proximal side of the screw groove, and a bottom wall interconnecting the first side wall and the second side wall, and the bottom wall has a widening portion whose width in a direction along the central axis increases.
- the medical device including the connector portion capable of suppressing the unintentional release of fluid communication due to the application of the external force in the pulling direction.
- FIG. 1 is a side view illustrating a medical device according to a first embodiment of the present disclosure together with another medical device.
- FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 .
- FIG. 3 is a cross-sectional view illustrating only an inner cylinder and an outer cylinder in the medical device according to the first embodiment with reference to FIG. 2 .
- FIG. 4 is a cross-sectional view illustrating a state where another medical device is connected to the inner cylinder of the medical device according to the first embodiment with reference to FIG. 2 .
- FIG. 5 is a cross-sectional view illustrating a state where another medical device is connected to the medical device according to the first embodiment in such a manner that a fluid communicates between the another medical device and the medical device with reference to FIG. 2 .
- FIG. 6A is a developed view for describing an engagement state of a screw groove and an engagement protrusion in the state illustrated in FIG. 5 .
- FIG. 6B is a modification of a stop portion illustrated in FIG. 6A .
- FIG. 6C is another modification of the stop portion illustrated in FIG. 6A .
- FIG. 7A is a cross-sectional view taken along line VIIA-VIIA of FIG. 6A .
- FIG. 7B is a modification of the screw groove and the engagement protrusion illustrated in FIG. 7A .
- FIG. 8 is a cross-sectional view illustrating a state where another medical device is connected to a medical device according to a second embodiment of the present disclosure in such a manner that a fluid communicates between the another medical device and the medical device.
- FIG. 9 is a developed view for describing an engagement state of a screw groove and an engagement protrusion in the state illustrated in FIG. 8 .
- FIG. 10A is a cross-sectional view illustrating a state where another medical device is connected to a medical device according to a third embodiment of the present disclosure in such a manner that a fluid communicates between the another medical device and the medical device.
- FIG. 10B is a partially enlarged view of FIG. 10A .
- the medical device 1 according to a first embodiment of the present disclosure will be illustrated and described in detail with reference to FIGS. 1 to 7B .
- the medical device 1 according to the present embodiment is configured as a medical connector used for infusion into a living body such as a human body, and includes a connector portion 3 capable of fluid communication with another medical device (in this example, a medical connector) 2 .
- the medical device 1 may be configured as a syringe or the like which is used for infusion into a living body such as a human body.
- the connector portion 3 has a distal end 4 , a proximal end 5 , and a central axis O.
- the connector portion 3 has an outer cylinder 6 and an inner cylinder 7 arranged on a radially inner side of the outer cylinder 6 in the present embodiment.
- the outer cylinder 6 has a screw groove 8 configured for fluid communication between the connector portion 3 and another medical device 2
- the inner cylinder 7 has an engagement protrusion 9 which is guided to the screw groove 8 in the present embodiment as illustrated in FIG. 3 .
- the screw groove 8 is configured as a double thread groove
- the engagement protrusion 9 is configured as two protrusions corresponding to the double thread groove.
- the screw groove 8 may be a single thread groove or triple or more thread groove.
- the engagement protrusion 9 is configured as a cylindrical protrusion in the present embodiment, but a shape of the engagement protrusion 9 is not particularly limited as long as the engagement protrusion 9 has a protrusion which is guided to the screw groove 8 .
- the connector portion 3 includes a valve body 10 arranged on a radially inner side of the inner cylinder 7 and a spike 11 capable of penetrating the valve body 10 as illustrated in FIG. 2 .
- the valve body 10 has an apical cylindrical head portion 13 having a slit 12 through which the spike 11 can penetrate, and a body portion 14 which can be elastically deformed in a direction along the central axis O (hereinafter also referred to as an axial direction).
- the body portion 14 is stretchable by being formed in a bellows shape.
- the head portion 13 and the body portion 14 of the valve body 10 are integrally formed, but may be separately formed.
- a coil spring may be used instead of the body portion 14 .
- the spike 11 has a cylindrical shape which extends in the axial direction and which is closed by the distal end portion 15 , and the distal end portion 15 is formed in a sharp pointed shape.
- a communicating hole 16 penetrating the spike 11 is formed on a side surface of the distal end portion 15 . Therefore, when the spike 11 penetrates the head portion 13 of the valve body 10 , the spike 11 can form a flow path of a fluid such as a chemical solution inside the spike 11 (see FIG. 5 described later).
- the spike 11 constitutes a part of a flow path formation member 17 .
- the flow path formation member 17 has a female connector portion 18 connected to a proximal end portion of the spike 11 and a flange 19 connected to a proximal end portion of the outer cylinder 6 .
- Another medical device 2 has a closed female connector portion 21 which can be closed by an elastic valve 20 .
- the connector portion 3 of the medical device 1 is configured to move the inner cylinder 7 in the axial direction with respect to the outer cylinder 6 in a state where another medical device 2 is connected to the inner cylinder 7 so that the valve body 10 is pressed against the elastic valve 20 as illustrated in FIG. 4 , thereby switching presence or absence of fluid communication between the connector portion 3 and another medical device 2 . That is, the connector portion 3 and another medical device 2 are not connected in such a manner that a fluid communicates between the connector portion 3 and the another medical device 2 in the state illustrated in FIG. 4 , but the connector portion 3 and another medical device 2 are connected in such a manner that a fluid communicates between the connector portion 3 and the another medical device 2 in a state illustrated in FIG. 5 .
- the inner cylinder 7 has a tubular connection cylinder 24 having on a screw portion 23 , which is engaged with a screw portion 22 provided on an outer circumferential surface of the female connector portion 21 of another medical device 2 , on an inner circumferential surface.
- the inner cylinder 7 has a cylindrical enclosure cylinder 25 which is connected to a proximal end portion of the connection cylinder 24 and encloses the head portion 13 of the valve body 10 .
- a lower end portion of the enclosure cylinder 25 is connected to a distal end portion of a tubular engagement cylinder 26 having the engagement protrusion 9 (see FIG. 5 ) on an outer circumferential surface.
- An annular step portion 27 extending in a radial direction is formed at a connecting portion between the enclosure cylinder 25 and the engagement cylinder 26 .
- a distal end portion of the body portion 14 of the valve body 10 abuts on the annular step portion 27
- a proximal end portion of the body portion 14 abuts on the flange 19 of the flow path formation member 17 .
- the inner cylinder 7 is biased (i.e., located) toward the distal end 4 by the body portion 14 of the valve body 10 in the present embodiment.
- a locking recess 28 (in this example, formed in an annular shape) is provided between the connection cylinder 24 and the engagement cylinder 26 as a locking portion that can be locked to the outer cylinder 6 , and the outer cylinder 6 is provided with locking claws 29 (in this example, four locking claws are arranged at equal intervals in a circumferential direction) that can be locked to the locking recess 28 .
- the screw groove 8 has a first side wall 30 on a distal side of the screw groove 8 (i.e., provided close to the distal end 4 ) and a second side wall 31 on a proximal side of the screw groove 8 (i.e., provided close to the proximal end 5 ) as illustrated in FIGS. 3 and 6A .
- an arrow X indicates an axially distal end side (the distal end 4 side in the direction along the central axis O).
- the first side wall 30 has a stop portion 32 having a lead angle ⁇ of zero (i.e., in a direction orthogonal to the central axis O) at a terminal end on the proximal end 5 side of the screw groove 8 (a terminal end of a movable range of the engagement protrusion 9 ) in the present embodiment. Accordingly, the engagement protrusion 9 of the inner cylinder 7 is in contact with the stop portion 32 in a state where the connector portion 3 and another medical device 2 are connected in such a manner that a fluid communicates between the connector portion 3 and the another medical device 2 and screwing of the inner cylinder 7 to the outer cylinder 6 has been completed as illustrated in FIG. 5 .
- the inner cylinder 7 can be biased toward the distal end 4 (that is, in the separation direction) in the fluid communication state, and thus, the engagement protrusion 9 rather hardly moves from the stop portion 32 , and it is possible to suppress the unintentional release of the fluid communication.
- the same effect as the above effect can be obtained even in a case where the lead angle ⁇ of the stop portion 32 has a negative value, for example, as illustrated in FIG. 6B and a case where the lead angle ⁇ of the stop portion 32 has a positive value, for example, as illustrated in FIG. 6C .
- the stop portion 32 is not limited to a linear shape (planar shape) as illustrated in FIGS. 6A to 6C , and may have a curved shape (curved surface shape).
- the stop portion 32 it can be sufficient for the stop portion 32 to be a portion where the lead angle ⁇ has been reduced (for example, smaller than the lead angle ⁇ in a portion other than the stop portion 32 ) or eliminated (for example, the lead angle ⁇ is zero or has a negative value), and the same effect as the above effect can be obtained with such a configuration.
- the screw groove 8 has a bottom wall 33 interconnecting the first side wall 30 and the second side wall 31 in the present embodiment. Further, the bottom wall 33 has a widening portion 34 in which a width W of the axial direction increases. An end edge on the axially distal end side of the widening portion 34 is connected to the stop portion 32 . In addition, the lead angle ⁇ of the second side wall 31 has the same size in a portion connected to the widening portion 34 and the other portion. Therefore, it is also possible to consider that the above-described effect that it is possible to suppress the unintentional release of fluid communication due to the application of the external force in the pulling direction can be obtained by providing the widening portion 34 .
- the engagement protrusion 9 is configured to be in point contact (i.e., only a corner of the engagement protrusion 9 is in contact) with the stop portion 32 as illustrated in FIG. 7A in the present embodiment. That is, an inclination in a cross section of the outer circumferential surface 35 of the engagement protrusion 9 is different from an inclination in the cross section of the stop portion 32 .
- the present disclosure is not limited to the shape as illustrated in FIG. 7A , but may have a shape illustrated in, for example, FIG. 7B , and the engagement protrusion 9 and the stop portion 32 may be in point contact with each other by another shape.
- the fluid communication can be released by an operation of applying a relatively small torque. That is, the stop portion 32 is provided in the present embodiment, but a biasing force generated by the body portion 14 of the valve body 10 does not contribute to the reduction of the torque required to move the engagement protrusion 9 from the stop portion 32 .
- a torque that can be required for an operation of rotating the inner cylinder 7 with respect to the outer cylinder 6 increases as compared to a case where the engagement protrusion 9 is positioned in the other portion.
- the engagement protrusion 9 is configured to be in point contact with the stop portion 32 as described above, and thus, a frictional force between the engagement protrusion 9 and the stop portion 32 can be reduced, and the torque required to move the engagement protrusion 9 from the stop portion 32 can be reduced. Thus, the risk of the fluid leakage can be reduced.
- the medical device 1 can include a stopper 36 that abuts on the engagement protrusion 9 having reached the stop portion 32 to help prevent the engagement protrusion 9 from moving toward the proximal end 5 as illustrated in FIGS. 5 and 6A in the present embodiment.
- a stopper 36 can help suppress rattling in the axial direction between the medical device 1 and another medical device 2 when a fluid communicates between the medical device 1 and the another medical device 2 .
- the stopper 36 is configured using an upper end edge of the tubular-shaped cylindrical wall 37 provided on the flange 19 of the flow path formation member 17 . Therefore, the outer cylinder 6 having the screw groove 8 in which the stop portion 32 has been formed can be rather easily formed by injection molding.
- a position where the stop portion 32 is provided can be appropriately changed as long as a position can help suppress the unintentional release of fluid communication when the external force in the pulling direction is applied.
- the outer cylinder 6 , the inner cylinder 7 , and the flow path formation member 17 can be formed by injection molding of a synthetic resin material, for example, but the material, a molding method, and the like are not particularly limited.
- the valve body 10 can be formed, for example, by injection molding of an elastic material such as rubber and a thermoplastic elastomer, but the material, a molding method, and the like are not particularly limited.
- each of the outer cylinder 6 , the inner cylinder 7 , the flow path formation member 17 , and the valve body 10 is configured using one part in the present embodiment, but may be configured using a plurality of parts.
- a medical device 1 ′ according to a second embodiment of the present disclosure will be illustrated and described in detail with reference to FIGS. 8 and 9 .
- the medical device 1 ′ according to the present embodiment has the same configuration as that of the first embodiment except that positions of the screw groove 8 and the engagement protrusion 9 have been reversed. That is, a connector portion 3 ′ includes an outer cylinder 6 ′ and an inner cylinder 7 ′ arranged on a radially inner side of the outer cylinder 6 ′, the inner cylinder 7 ′ has a screw groove 38 configured for fluid communication between the connector portion 3 ′ and another medical device 2 , and the outer cylinder 6 ′ has an engagement protrusion 39 guided to the screw groove 38 as illustrated in FIG. 8 in the present embodiment.
- the screw groove 38 has a first side wall 40 provided close to the distal end 4 and a second side wall 41 provided close to the proximal end 5 , and the second side wall 41 has a stop portion 42 in which a lead angle ⁇ has been reduced or eliminated as illustrated in FIG. 9 .
- the screw groove 38 can be provided in an engagement cylinder 26 ′ of the outer cylinder 6 ′, and an axial length, a diameter dimension and a thickness of the engagement cylinder 26 ′ may be appropriately changed from those in the case of the first embodiment. Even with such a configuration, it is possible to suppress an unintentional release of fluid communication due to an application of an external force in a pulling direction, which is similar to the case of the first embodiment.
- the medical device 50 includes: a connector portion 53 having a distal end 51 and a proximal end 52 ; and a screw groove 54 for fluid communication between the connector portion 53 and another medical device 60 .
- the screw groove 54 has a first side wall 55 provided close to the distal end 51 and a second side wall 56 provided close to the proximal end 52 , and the first side wall 55 has a stop portion 57 in which a lead angle ⁇ has been reduced or eliminated.
- the engagement protrusion 62 provided on a female connector portion 61 of another medical device 60 is engaged with the stop portion 57 . Even with such a configuration, it is possible to suppress an unintentional release of fluid communication due to an application of an external force in a pulling direction, which is similar to the case of the first embodiment.
Abstract
Description
- This application is a divisional of U.S. application Ser. No. 16/560,058 filed on Sep. 4, 2019, which is a continuation of International Application No. PCT/JP2018/011486 filed on Mar. 22, 2018, which claims priority to Japanese Application No. 2017-058828 filed on Mar. 24, 2017, the entire content of all three of which is incorporated herein by reference.
- The present disclosure relates to a medical device.
- Conventionally, among medical devices used for infusion into a living body such as a human body, a medical connector or a syringe having a connector portion are known. Such a medical device sometimes includes a screw groove configured for fluid communication between the connector portion and another medical device.
- For example, U.S. Pat. No. 8,157,784 discloses a medical connector (medical device) including a closed male connector portion that can be closed by a valve body, the medical connector further including a screw groove configured for fluid communication between the male connector portion and a female connector portion of another medical connector (another medical device). The female connector portion of another medical connector is a closed female connector portion that can be closed by an elastic valve. Further, another medical connector is screwed along the screw groove so that a spike provided on the male connector portion penetrates the valve body and the elastic valve in contact with each other, whereby the male connector portion and the female connector portion can be connected in such a manner that a fluid communicates between the male connector portion and the female connector portion.
- In the medical device (medical connector) as described in U.S. Pat. No. 8,157,784, there is a risk that a screw is loosened and the fluid communication is released unintentionally depending on setting of a lead angle of the screw groove in a fluid communication state between the connector portion (closed male connector portion) and another medical device (another medical connector) when an external force in a direction (separation direction) to separate the medical devices from each other is applied, that is, when an external force in a pulling direction is applied.
- In addition, the medical device described in U.S. Pat. No. 8,157,784 is configured such that the valve body biases another medical device in the separation direction and the valve body is pressed against the elastic valve when another medical device is screwed along the screw groove. In this manner, the screw can be easily loosened when the external force in the pulling direction is applied particularly in the case where the valve body is configured to bias another medical device in the separation direction.
- A medical device is disclosed, which includes a connector portion capable of suppressing an unintentional release of fluid communication due to an application of an external force in a pulling direction.
- A medical device as a first aspect of the present disclosure is a medical device including: a connector portion having a distal end and a proximal end, and a screw groove configured for fluid communication between the connector portion and another medical device, in which the screw groove has a first side wall on a distal side of the screw groove and a second side wall on a proximal side of the screw groove, and the first side wall has a stop portion whose lead angle has been reduced or eliminated.
- In accordance with an embodiment of the present disclosure, the connector portion has an outer cylinder and an inner cylinder arranged on a radially inner side of the outer cylinder, and the outer cylinder has the screw groove, and the inner cylinder has an engagement protrusion which is guided to the screw groove.
- In accordance with an embodiment of the present disclosure, the inner cylinder is biased toward the distal end.
- In accordance with an embodiment of the present disclosure, the engagement protrusion is in point contact with the stop portion.
- In accordance with an embodiment of the present disclosure, the medical device further includes a stopper that abuts on the engagement protrusion, which has reached the stop portion, so as to prevent the engagement protrusion from moving toward the proximal end.
- In accordance with an embodiment of the present disclosure, the connector portion further has a valve body arranged on a radially inner side of the inner cylinder, and a spike capable of penetrating the valve body.
- A medical device as a second aspect of the present disclosure is a medical device including a connector portion having a distal end and a proximal end, in which the connector portion has an outer cylinder and an inner cylinder arranged on a radially inner side of the outer cylinder, the inner cylinder has a screw groove configured for fluid communication between the connector portion and another medical device, and the outer cylinder has an engagement protrusion guided to the screw groove, the screw groove has a first side wall on the distal side of the screw groove and a second side wall on the proximal side of the screw groove, and the second side wall has a stop portion whose lead angle has been reduced or eliminated.
- A medical device as a third aspect of the present disclosure is a medical device including: a connector portion having a distal end, a proximal end and a central axis; and a screw groove for fluid communication between the connector portion and another medical device, in which the screw groove has a first side wall on the distal side of the screw groove, a second side wall on the proximal side of the screw groove, and a bottom wall interconnecting the first side wall and the second side wall, and the bottom wall has a widening portion whose width in a direction along the central axis increases.
- According to the present disclosure, it is possible to provide the medical device including the connector portion capable of suppressing the unintentional release of fluid communication due to the application of the external force in the pulling direction.
-
FIG. 1 is a side view illustrating a medical device according to a first embodiment of the present disclosure together with another medical device. -
FIG. 2 is a cross-sectional view taken along line II-II ofFIG. 1 . -
FIG. 3 is a cross-sectional view illustrating only an inner cylinder and an outer cylinder in the medical device according to the first embodiment with reference toFIG. 2 . -
FIG. 4 is a cross-sectional view illustrating a state where another medical device is connected to the inner cylinder of the medical device according to the first embodiment with reference toFIG. 2 . -
FIG. 5 is a cross-sectional view illustrating a state where another medical device is connected to the medical device according to the first embodiment in such a manner that a fluid communicates between the another medical device and the medical device with reference toFIG. 2 . -
FIG. 6A is a developed view for describing an engagement state of a screw groove and an engagement protrusion in the state illustrated inFIG. 5 . -
FIG. 6B is a modification of a stop portion illustrated inFIG. 6A . -
FIG. 6C is another modification of the stop portion illustrated inFIG. 6A . -
FIG. 7A is a cross-sectional view taken along line VIIA-VIIA ofFIG. 6A . -
FIG. 7B is a modification of the screw groove and the engagement protrusion illustrated inFIG. 7A . -
FIG. 8 is a cross-sectional view illustrating a state where another medical device is connected to a medical device according to a second embodiment of the present disclosure in such a manner that a fluid communicates between the another medical device and the medical device. -
FIG. 9 is a developed view for describing an engagement state of a screw groove and an engagement protrusion in the state illustrated inFIG. 8 . -
FIG. 10A is a cross-sectional view illustrating a state where another medical device is connected to a medical device according to a third embodiment of the present disclosure in such a manner that a fluid communicates between the another medical device and the medical device. -
FIG. 10B is a partially enlarged view ofFIG. 10A . - Hereinafter, a medical device according to one embodiment of the present disclosure will be illustrated and described in detail with reference to the drawings. First, a medical device 1 according to a first embodiment of the present disclosure will be illustrated and described in detail with reference to
FIGS. 1 to 7B . As illustrated inFIG. 1 , the medical device 1 according to the present embodiment is configured as a medical connector used for infusion into a living body such as a human body, and includes aconnector portion 3 capable of fluid communication with another medical device (in this example, a medical connector) 2. The medical device 1 may be configured as a syringe or the like which is used for infusion into a living body such as a human body. - As illustrated in
FIG. 2 , theconnector portion 3 has adistal end 4, a proximal end 5, and a central axis O. In addition, theconnector portion 3 has anouter cylinder 6 and aninner cylinder 7 arranged on a radially inner side of theouter cylinder 6 in the present embodiment. Further, theouter cylinder 6 has ascrew groove 8 configured for fluid communication between theconnector portion 3 and anothermedical device 2, and theinner cylinder 7 has an engagement protrusion 9 which is guided to thescrew groove 8 in the present embodiment as illustrated inFIG. 3 . In the present embodiment, thescrew groove 8 is configured as a double thread groove, and the engagement protrusion 9 is configured as two protrusions corresponding to the double thread groove. However, thescrew groove 8 may be a single thread groove or triple or more thread groove. In addition, the engagement protrusion 9 is configured as a cylindrical protrusion in the present embodiment, but a shape of the engagement protrusion 9 is not particularly limited as long as the engagement protrusion 9 has a protrusion which is guided to thescrew groove 8. - In accordance with the present embodiment, the
connector portion 3 includes avalve body 10 arranged on a radially inner side of theinner cylinder 7 and aspike 11 capable of penetrating thevalve body 10 as illustrated inFIG. 2 . Thevalve body 10 has an apicalcylindrical head portion 13 having a slit 12 through which thespike 11 can penetrate, and abody portion 14 which can be elastically deformed in a direction along the central axis O (hereinafter also referred to as an axial direction). In accordance with an exemplary embodiment, thebody portion 14 is stretchable by being formed in a bellows shape. In accordance with an exemplary embodiment, thehead portion 13 and thebody portion 14 of thevalve body 10 are integrally formed, but may be separately formed. In addition, for example, a coil spring may be used instead of thebody portion 14. - In accordance with an exemplary embodiment, the
spike 11 has a cylindrical shape which extends in the axial direction and which is closed by the distal end portion 15, and the distal end portion 15 is formed in a sharp pointed shape. In addition, a communicating hole 16 penetrating thespike 11 is formed on a side surface of the distal end portion 15. Therefore, when thespike 11 penetrates thehead portion 13 of thevalve body 10, thespike 11 can form a flow path of a fluid such as a chemical solution inside the spike 11 (seeFIG. 5 described later). In the present embodiment, thespike 11 constitutes a part of a flowpath formation member 17. The flowpath formation member 17 has afemale connector portion 18 connected to a proximal end portion of thespike 11 and a flange 19 connected to a proximal end portion of theouter cylinder 6. - Another
medical device 2 has a closedfemale connector portion 21 which can be closed by anelastic valve 20. Further, theconnector portion 3 of the medical device 1 is configured to move theinner cylinder 7 in the axial direction with respect to theouter cylinder 6 in a state where anothermedical device 2 is connected to theinner cylinder 7 so that thevalve body 10 is pressed against theelastic valve 20 as illustrated inFIG. 4 , thereby switching presence or absence of fluid communication between theconnector portion 3 and anothermedical device 2. That is, theconnector portion 3 and anothermedical device 2 are not connected in such a manner that a fluid communicates between theconnector portion 3 and the anothermedical device 2 in the state illustrated inFIG. 4 , but theconnector portion 3 and anothermedical device 2 are connected in such a manner that a fluid communicates between theconnector portion 3 and the anothermedical device 2 in a state illustrated inFIG. 5 . - In accordance with an exemplary embodiment, the
inner cylinder 7 has atubular connection cylinder 24 having on ascrew portion 23, which is engaged with ascrew portion 22 provided on an outer circumferential surface of thefemale connector portion 21 of anothermedical device 2, on an inner circumferential surface. In addition, theinner cylinder 7 has acylindrical enclosure cylinder 25 which is connected to a proximal end portion of theconnection cylinder 24 and encloses thehead portion 13 of thevalve body 10. A lower end portion of theenclosure cylinder 25 is connected to a distal end portion of atubular engagement cylinder 26 having the engagement protrusion 9 (seeFIG. 5 ) on an outer circumferential surface. Anannular step portion 27 extending in a radial direction is formed at a connecting portion between theenclosure cylinder 25 and theengagement cylinder 26. A distal end portion of thebody portion 14 of thevalve body 10 abuts on theannular step portion 27, and a proximal end portion of thebody portion 14 abuts on the flange 19 of the flowpath formation member 17. In this manner, theinner cylinder 7 is biased (i.e., located) toward thedistal end 4 by thebody portion 14 of thevalve body 10 in the present embodiment. - In addition, a locking recess 28 (in this example, formed in an annular shape) is provided between the
connection cylinder 24 and theengagement cylinder 26 as a locking portion that can be locked to theouter cylinder 6, and theouter cylinder 6 is provided with locking claws 29 (in this example, four locking claws are arranged at equal intervals in a circumferential direction) that can be locked to the lockingrecess 28. - Further, when another
medical device 2 is screwed into theinner cylinder 7 as illustrated inFIG. 4 in a state where theinner cylinder 7 is locked to theouter cylinder 6, thevalve body 10 is pressed against theelastic valve 20, and anothermedical device 2 is connected to theinner cylinder 7. Then, when anothermedical device 2 is rotated in the same direction as when screwed into theinner cylinder 7, the engagement between theouter cylinder 6 and theinner cylinder 7 is released as the lockingclaws 29 are separated from the lockingrecess 28, the engagement protrusion 9 of theinner cylinder 7 is guided toward the proximal end 5 along thescrew groove 8 of theouter cylinder 6, thehead portion 13 of thevalve body 10 and theelastic valve 20 move toward the proximal end 5 together with theinner cylinder 7, thehead portion 13 and theelastic valve 20 are penetrated by thespike 11, and theconnector portion 3 and anothermedical device 2 are connected in such a manner that a fluid communicates between theconnector portion 3 and the anothermedical device 2 as illustrated inFIG. 5 . Anothermedical device 2 may be rotated in the opposite direction to the above direction with respect to the medical device 1 in order to separate the medical device 1 and anothermedical device 2 from each other. - In the present embodiment, the
screw groove 8 has afirst side wall 30 on a distal side of the screw groove 8 (i.e., provided close to the distal end 4) and asecond side wall 31 on a proximal side of the screw groove 8 (i.e., provided close to the proximal end 5) as illustrated inFIGS. 3 and 6A . InFIG. 6A , an arrow X indicates an axially distal end side (thedistal end 4 side in the direction along the central axis O). Further, thefirst side wall 30 has astop portion 32 having a lead angle α of zero (i.e., in a direction orthogonal to the central axis O) at a terminal end on the proximal end 5 side of the screw groove 8 (a terminal end of a movable range of the engagement protrusion 9) in the present embodiment. Accordingly, the engagement protrusion 9 of theinner cylinder 7 is in contact with thestop portion 32 in a state where theconnector portion 3 and anothermedical device 2 are connected in such a manner that a fluid communicates between theconnector portion 3 and the anothermedical device 2 and screwing of theinner cylinder 7 to theouter cylinder 6 has been completed as illustrated inFIG. 5 . Thus, even if an external force in a direction (separation direction) to separate the medical device 1 and anothermedical device 2, that is, an external force in a pulling direction is applied between the medical device 1 and anothermedical device 2, the engagement protrusion 9 of theinner cylinder 7 is supported by thestop portion 32 having the lead angle α of zero, and thus, the engagement protrusion 9 is not guided along thescrew groove 8 toward thedistal end 4 due to the external force in the pulling direction. Therefore, theinner cylinder 7 does not move toward thedistal end 4 with respect to theouter cylinder 6 and the fluid communication is not released. In this manner, it is possible to suppress an unintentional release of fluid communication due to the application of the external force in the pulling direction according to the medical device 1 of the present embodiment. - According to the medical device 1 of the present embodiment, the
inner cylinder 7 can be biased toward the distal end 4 (that is, in the separation direction) in the fluid communication state, and thus, the engagement protrusion 9 rather hardly moves from thestop portion 32, and it is possible to suppress the unintentional release of the fluid communication. - In accordance with an exemplary embodiment, as long as the lead angle α of the
stop portion 32 is a value close to zero even if being not zero, the same effect as the above effect can be obtained even in a case where the lead angle α of thestop portion 32 has a negative value, for example, as illustrated inFIG. 6B and a case where the lead angle α of thestop portion 32 has a positive value, for example, as illustrated inFIG. 6C . In addition, thestop portion 32 is not limited to a linear shape (planar shape) as illustrated inFIGS. 6A to 6C , and may have a curved shape (curved surface shape). In accordance with an exemplary embodiment, it can be sufficient for thestop portion 32 to be a portion where the lead angle α has been reduced (for example, smaller than the lead angle α in a portion other than the stop portion 32) or eliminated (for example, the lead angle α is zero or has a negative value), and the same effect as the above effect can be obtained with such a configuration. - In addition, the
screw groove 8 has abottom wall 33 interconnecting thefirst side wall 30 and thesecond side wall 31 in the present embodiment. Further, thebottom wall 33 has a wideningportion 34 in which a width W of the axial direction increases. An end edge on the axially distal end side of the wideningportion 34 is connected to thestop portion 32. In addition, the lead angle α of thesecond side wall 31 has the same size in a portion connected to the wideningportion 34 and the other portion. Therefore, it is also possible to consider that the above-described effect that it is possible to suppress the unintentional release of fluid communication due to the application of the external force in the pulling direction can be obtained by providing the wideningportion 34. - In accordance with an exemplary embodiment, the engagement protrusion 9 is configured to be in point contact (i.e., only a corner of the engagement protrusion 9 is in contact) with the
stop portion 32 as illustrated inFIG. 7A in the present embodiment. That is, an inclination in a cross section of the outercircumferential surface 35 of the engagement protrusion 9 is different from an inclination in the cross section of thestop portion 32. The present disclosure is not limited to the shape as illustrated inFIG. 7A , but may have a shape illustrated in, for example,FIG. 7B , and the engagement protrusion 9 and thestop portion 32 may be in point contact with each other by another shape. - According to such a configuration, even when the engagement protrusion 9 is positioned at the
stop portion 32, the fluid communication can be released by an operation of applying a relatively small torque. That is, thestop portion 32 is provided in the present embodiment, but a biasing force generated by thebody portion 14 of thevalve body 10 does not contribute to the reduction of the torque required to move the engagement protrusion 9 from thestop portion 32. Thus, when the engagement protrusion 9 is positioned at thestop portion 32, a torque that can be required for an operation of rotating theinner cylinder 7 with respect to theouter cylinder 6 increases as compared to a case where the engagement protrusion 9 is positioned in the other portion. If this torque is too large, anothermedical device 2 rotates with respect to theinner cylinder 7 before theinner cylinder 7 rotates with respect to theouter cylinder 6 when an operation of rotating anothermedical device 2 with respect to the medical device 1 has been performed to release the fluid communication, and as a result, there is a risk that a fluid leaks. In the present embodiment, however, the engagement protrusion 9 is configured to be in point contact with thestop portion 32 as described above, and thus, a frictional force between the engagement protrusion 9 and thestop portion 32 can be reduced, and the torque required to move the engagement protrusion 9 from thestop portion 32 can be reduced. Thus, the risk of the fluid leakage can be reduced. - In addition, the medical device 1 can include a
stopper 36 that abuts on the engagement protrusion 9 having reached thestop portion 32 to help prevent the engagement protrusion 9 from moving toward the proximal end 5 as illustrated inFIGS. 5 and 6A in the present embodiment. Such astopper 36 can help suppress rattling in the axial direction between the medical device 1 and anothermedical device 2 when a fluid communicates between the medical device 1 and the anothermedical device 2. In the present embodiment, thestopper 36 is configured using an upper end edge of the tubular-shaped cylindrical wall 37 provided on the flange 19 of the flowpath formation member 17. Therefore, theouter cylinder 6 having thescrew groove 8 in which thestop portion 32 has been formed can be rather easily formed by injection molding. - Although the
stop portion 32 is provided at the terminal end of thescrew groove 8 in the present embodiment, a position where thestop portion 32 is provided can be appropriately changed as long as a position can help suppress the unintentional release of fluid communication when the external force in the pulling direction is applied. - In addition, the
outer cylinder 6, theinner cylinder 7, and the flowpath formation member 17 can be formed by injection molding of a synthetic resin material, for example, but the material, a molding method, and the like are not particularly limited. In addition, thevalve body 10 can be formed, for example, by injection molding of an elastic material such as rubber and a thermoplastic elastomer, but the material, a molding method, and the like are not particularly limited. Furthermore, each of theouter cylinder 6, theinner cylinder 7, the flowpath formation member 17, and thevalve body 10 is configured using one part in the present embodiment, but may be configured using a plurality of parts. - Next, a medical device 1′ according to a second embodiment of the present disclosure will be illustrated and described in detail with reference to
FIGS. 8 and 9 . The medical device 1′ according to the present embodiment has the same configuration as that of the first embodiment except that positions of thescrew groove 8 and the engagement protrusion 9 have been reversed. That is, aconnector portion 3′ includes anouter cylinder 6′ and aninner cylinder 7′ arranged on a radially inner side of theouter cylinder 6′, theinner cylinder 7′ has ascrew groove 38 configured for fluid communication between theconnector portion 3′ and anothermedical device 2, and theouter cylinder 6′ has anengagement protrusion 39 guided to thescrew groove 38 as illustrated inFIG. 8 in the present embodiment. Further, thescrew groove 38 has afirst side wall 40 provided close to thedistal end 4 and a second side wall 41 provided close to the proximal end 5, and the second side wall 41 has astop portion 42 in which a lead angle α has been reduced or eliminated as illustrated inFIG. 9 . Thescrew groove 38 can be provided in anengagement cylinder 26′ of theouter cylinder 6′, and an axial length, a diameter dimension and a thickness of theengagement cylinder 26′ may be appropriately changed from those in the case of the first embodiment. Even with such a configuration, it is possible to suppress an unintentional release of fluid communication due to an application of an external force in a pulling direction, which is similar to the case of the first embodiment. - Next, a
medical device 50 according to a third embodiment of the present disclosure will be illustrated and described in detail with reference toFIGS. 10A and 10B . Themedical device 50 according to the present embodiment includes: aconnector portion 53 having a distal end 51 and a proximal end 52; and a screw groove 54 for fluid communication between theconnector portion 53 and another medical device 60. Further, the screw groove 54 has afirst side wall 55 provided close to the distal end 51 and asecond side wall 56 provided close to the proximal end 52, and thefirst side wall 55 has a stop portion 57 in which a lead angle α has been reduced or eliminated. In a fluid communication state illustrated inFIG. 10A , theengagement protrusion 62 provided on a female connector portion 61 of another medical device 60 is engaged with the stop portion 57. Even with such a configuration, it is possible to suppress an unintentional release of fluid communication due to an application of an external force in a pulling direction, which is similar to the case of the first embodiment. - Although one embodiment of the present disclosure has been described as above, the part described above only illustrate an example of embodiments of the present disclosure, and it is a matter of course that various changes may be applied within a scope not departing from a gist of the disclosure.
- The detailed description above describes to a medical device. The invention is not limited, however, to the precise embodiments and variations described. Various changes, modifications and equivalents can be effected by one skilled in the art without departing from the spirit and scope of the invention as defined in the accompanying claims. It is expressly intended that all such changes, modifications and equivalents which fall within the scope of the claims are embraced by the claims.
Claims (7)
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US16/560,058 US11452856B2 (en) | 2017-03-24 | 2019-09-04 | Medical device |
US17/811,334 US11766551B2 (en) | 2017-03-24 | 2022-07-08 | Medical device |
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US16/560,058 Division US11452856B2 (en) | 2017-03-24 | 2019-09-04 | Medical device |
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JP7049317B2 (en) | 2017-03-24 | 2022-04-06 | テルモ株式会社 | Medical equipment |
US20240042188A1 (en) * | 2022-08-04 | 2024-02-08 | Carefusion 303, Inc. | Coupling device for medical tubing |
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US20130304038A1 (en) * | 2011-01-18 | 2013-11-14 | Kabushiki Kaisha Top | Female-side connector |
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JPS5140971Y2 (en) * | 1971-07-08 | 1976-10-06 | ||
US6113068A (en) * | 1998-10-05 | 2000-09-05 | Rymed Technologies | Swabbable needleless injection port system having low reflux |
US6745998B2 (en) * | 2001-08-10 | 2004-06-08 | Alaris Medical Systems, Inc. | Valved male luer |
JP2003106321A (en) * | 2001-09-27 | 2003-04-09 | Meidoo:Kk | Nut |
US7648491B2 (en) | 2005-05-13 | 2010-01-19 | Bob Rogers | Medical substance transfer system |
US9168366B2 (en) * | 2008-12-19 | 2015-10-27 | Icu Medical, Inc. | Medical connector with closeable luer connector |
JP2011020730A (en) * | 2009-07-21 | 2011-02-03 | Nittoh Kogaku Kk | Fastening member |
US8603047B2 (en) * | 2010-12-15 | 2013-12-10 | Infusion Innovations | Devices, assemblies and methods for controlling fluid flow |
US9308362B2 (en) * | 2013-03-12 | 2016-04-12 | Carefusion 303, Inc. | Male luer with fluid path and vent path seals |
WO2016051759A1 (en) * | 2014-09-29 | 2016-04-07 | テルモ株式会社 | Female connector, male connector, and connector connection body |
JP7049317B2 (en) | 2017-03-24 | 2022-04-06 | テルモ株式会社 | Medical equipment |
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2018
- 2018-03-22 JP JP2019506984A patent/JP7049317B2/en active Active
- 2018-03-22 WO PCT/JP2018/011486 patent/WO2018174183A1/en active Application Filing
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- 2019-09-04 US US16/560,058 patent/US11452856B2/en active Active
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- 2022-07-08 US US17/811,334 patent/US11766551B2/en active Active
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US7713247B2 (en) * | 1991-12-18 | 2010-05-11 | Icu Medical, Inc. | Medical valve and method of use |
US20080287920A1 (en) * | 2007-05-16 | 2008-11-20 | Fangrow Thomas F | Medical connector with closeable male luer |
US20130304038A1 (en) * | 2011-01-18 | 2013-11-14 | Kabushiki Kaisha Top | Female-side connector |
US20160045629A1 (en) * | 2014-08-13 | 2016-02-18 | Excelsior Medical Corporation | Disinfectant Caps |
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JPWO2018174183A1 (en) | 2020-01-30 |
US20190388673A1 (en) | 2019-12-26 |
US11766551B2 (en) | 2023-09-26 |
JP7049317B2 (en) | 2022-04-06 |
US11452856B2 (en) | 2022-09-27 |
WO2018174183A1 (en) | 2018-09-27 |
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